Patents by Inventor Vernon K. Drylie

Vernon K. Drylie has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cadmium free gold alloys
    Patent number: 4473621
    Abstract: This invention relates to brazing alloys for use primarily in jewellery manufacture having compositions consisting of 30 to 80 weight % gold, 0 to 20 weight % silver, 20 to 60 weight % copper, 5 to 20 weight % zinc, 0 to 5.0.% of a group VIII metal as a grain refiner for gold, and 0.5 to 3.0 weight % indium. These alloys have desirable properties, particularly in the 14 karat gold range, without the health hazards associated with the use of cadmium.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: September 25, 1984
    Assignee: Johnson Matthey Limited
    Inventor: Vernon K. Drylie